Python: Parsing einer komplexen XML-Datei

feuerjinn · 2. Oktober 2015

Heyho,

Ich bau wie schon in dem anderen Thread erwähnt jetzt mein Bash Skript in ein Python skript um. So gesehen kann Python vieles besonders einfacher. Sehr coole Sache auf jeden Fall.

Ich habe schon verschiedene XML-Parsing Implementationen ausprobiert, komme aber nich auf einen guten nenner.(lxml, xml.etree.EllementTree, xml.etree.cElementTree, XPATH)

Folgende XML-Struktur habe ich. Erstmal ist nur der urn:jboss:domain:datasources:2.0 interessant.

<?xml version="1.0" ?>
<server xmlns="urn:jboss:domain:2.1">
    <extensions>
    </extensions>
    <profile>
        <subsystem xmlns="urn:biz.paluch.logging:logstash-gelf-subsystem:1.0"/>
        <subsystem xmlns="urn:jboss:domain:logging:2.0">
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:batch:1.0">
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:datasources:2.0">
            <datasources>
                <datasource jndi-name="java:jboss/datasources/JNDI" pool-name="JNDI" enabled="true">
                    <connection-url>jdbc:oracle:thin:@//HOST</connection-url>
                    <driver>ojdbc6</driver>
                    <pool>
                        <min-pool-size>50</min-pool-size>
                        <max-pool-size>100</max-pool-size>
                    </pool>
                    <security>
                        <user-name>USER</user-name>
                        <password>PWD</password>
                    </security>
                    <validation>
                        <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>true</background-validation>
                        <background-validation-millis>10000</background-validation-millis>
                        <exception-sorter class-name="org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter"/>
                    </validation>
                </datasource>
                <datasource jndi-name="java:jboss/datasources/JNDI" pool-name="JNDI" enabled="true">
                    <connection-url>jdbc:oracle:thin:@//HOST</connection-url>
                    <driver>ojdbc6</driver>
                    <pool>
                        <min-pool-size>50</min-pool-size>
                        <max-pool-size>100</max-pool-size>
                    </pool>
                    <security>
                        <user-name>USER</user-name>
                        <password>USER</password>
                    </security>
                    <validation>
                        <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>true</background-validation>
                        <background-validation-millis>10000</background-validation-millis>
                        <exception-sorter class-name="org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter"/>
                    </validation>
                </datasource>
                <datasource jndi-name="java:jboss/datasources/JNDI" pool-name="JNDI" enabled="true">
                    <connection-url>jdbc:oracle:thin:@//HOST</connection-url>
                    <driver>ojdbc6</driver>
                    <pool>
                        <min-pool-size>50</min-pool-size>
                        <max-pool-size>100</max-pool-size>
                    </pool>
                    <security>
                        <user-name>USER</user-name>
                        <password>USER</password>
                    </security>
                    <validation>
                        <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidConnectionChecker"/>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>true</background-validation>
                        <background-validation-millis>10000</background-validation-millis>
                        <exception-sorter class-name="org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter"/>
                    </validation>
                </datasource>
                <datasource jndi-name="java:jboss/datasources/InstanceConfiguration" pool-name="InstanceConfiguration" enabled="true" use-ccm="true">
                    <connection-url>jdbc:h2:/path/h2config/InstanceConfiguration;ACCESS_MODE_DATA=r;FILE_LOCK=NO</connection-url>
                    <driver>h2</driver>
                    <security>
                        <user-name>USER</user-name>
                        <password>USER</password>
                    </security>
                </datasource>
                <drivers>
                    <driver name="h2" module="com.h2database.h2">
                        <xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>
                    </driver>
                    <driver name="ojdbc6" module="oracle.ojdbc">
                        <xa-datasource-class>oracle.ojdbc.xa.client.OracleXADataSource</xa-datasource-class>
                    </driver>
                </drivers>
            </datasources>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:deployment-scanner:2.0">
              </subsystem>
        <subsystem xmlns="urn:jboss:domain:ee:2.0">
              </subsystem>
        <subsystem xmlns="urn:jboss:domain:ejb3:2.0">
               </subsystem>
        <subsystem xmlns="urn:jboss:domain:io:1.1">
               </subsystem>
        <subsystem xmlns="urn:jboss:domain:infinispan:2.0">
               </subsystem>
        <subsystem xmlns="urn:jboss:domain:jacorb:1.3">
               </subsystem>
        <subsystem xmlns="urn:jboss:domain:jaxrs:1.0"/>
        <subsystem xmlns="urn:jboss:domain:jca:2.0">
               </subsystem>
        <subsystem xmlns="urn:jboss:domain:jdr:1.0"/>
        <subsystem xmlns="urn:jboss:domain:jmx:1.3">
                    </subsystem>
        <subsystem xmlns="urn:jboss:domain:jpa:1.1">
                    </subsystem>
        <subsystem xmlns="urn:jboss:domain:jsf:1.0"/>
        <subsystem xmlns="urn:jboss:domain:jsr77:1.0"/>
        <subsystem xmlns="urn:jboss:domain:mail:2.0">
                    </subsystem>
        <subsystem xmlns="urn:jboss:domain:messaging:2.0">
                 </subsystem>
        <subsystem xmlns="urn:jboss:domain:naming:2.0">
            
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:pojo:1.0"/>
        <subsystem xmlns="urn:jboss:domain:remoting:2.0">
            
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:resource-adapters:2.0"/>
        <subsystem xmlns="urn:jboss:domain:sar:1.0"/>
        <subsystem xmlns="urn:jboss:domain:security:1.2">
            
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:transactions:2.0">
            
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:undertow:1.1">
            </subsystem>
        <subsystem xmlns="urn:jboss:domain:webservices:1.2">
                    </subsystem>
        <subsystem xmlns="urn:jboss:domain:weld:2.0"/>
    </profile>
    <interfaces>
        <interface name="management">
            <inet-address value="${jboss.bind.address.management:127.0.0.1}"/>
        </interface>
        <interface name="public">
            <inet-address value="${jboss.bind.address:127.0.0.1}"/>
        </interface>
        <interface name="unsecure">
            <inet-address value="${jboss.bind.address.unsecure:127.0.0.1}"/>
        </interface>
    </interfaces>
    <socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">
        <socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/>
        <socket-binding name="management-https" interface="management" port="${jboss.management.https.port:9993}"/>
        <socket-binding name="ajp" port="${jboss.ajp.port:8009}"/>
        <socket-binding name="http" port="${jboss.http.port:8080}"/>
        <socket-binding name="https" port="${jboss.https.port:8443}"/>
        <socket-binding name="jacorb" interface="unsecure" port="3528"/>
        <socket-binding name="jacorb-ssl" interface="unsecure" port="3529"/>
        <socket-binding name="messaging-group" port="0" multicast-address="${jboss.messaging.group.address:231.7.7.7}" multicast-port="${jboss.messaging.group.port:9876}"/>
        <socket-binding name="txn-recovery-environment" port="4712"/>
        <socket-binding name="txn-status-manager" port="4713"/>
        <outbound-socket-binding name="mail-smtp">
            <remote-destination host="localhost" port="25"/>
        </outbound-socket-binding>
        <outbound-socket-binding name="remote-ejb">
            <remote-destination host="localhost" port="${jboss.http.port:8080}"/>
        </outbound-socket-binding>
    </socket-binding-group>
</server>

Mein Code sähe so aus:

In[3]: import xml.etree.cElementTree as xtree
In[7]: xml = xtree.parse('standalone-full.xml')
In[8]: xml
Out[8]: <ElementTree at 0x482e588>
In[9]: root = xml.getroot()
In[10]: root
Out[10]: <Element '{urn:jboss:domain:2.1}server' at 0x0000000004836030>
In[11]: root.getchildren()
Out[11]: 
[<Element '{urn:jboss:domain:2.1}extensions' at 0x0000000004836060>,
 <Element '{urn:jboss:domain:2.1}system-properties' at 0x0000000004836AE0>,
 <Element '{urn:jboss:domain:2.1}management' at 0x0000000004836B70>,
 <Element '{urn:jboss:domain:2.1}profile' at 0x000000000483CB40>,
 <Element '{urn:jboss:domain:2.1}interfaces' at 0x000000000490F8A0>,
 <Element '{urn:jboss:domain:2.1}socket-binding-group' at 0x000000000490FC30>]
 In[13]: for children in root.findall('{urn:jboss:domain:2.1}profile'):
...     datasources = children.find('{urn:jboss:domain:datasources:2.0}datasources')
...     print datasources
...     
None

Jemand ne Idee wie ich das anstellen kann?

Danke.

feuerjinn · 13. Oktober 2015

Wurde jetzt mit einer RegEx gelöst. Ist nicht schön, aber bringt ein Ergebnis:

import re
In[133]: data = fo.readfile('standalone-full.xml') # liest den inhalt der datei ein
In[134]: data
Out[134]: '<?xml version="1.0" ?>\n\n<server xmlns="urn:jboss:domain:2.1">\n\n    <extensions>\n
In[135]: re.findall(r'.*:domain:datasources[\S\s]*?pool-name="JNDI"[\S\s]*?connection-url>.*@//(.*)<.*[\S\s]*?user-name>(.*)<.*\s*<password>(.*)<', data, re.M)
Out[135]: [('HOST', 'USER', 'PWD')]

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Python: Parsing einer komplexen XML-Datei

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